package com.rocky.study.volatitle;

/**
 * 指令重排代码演示
 */
public class VolatileDemo05 {

    private static int a = 0;
    private static boolean flag = false;

    public static void main(String[] args) throws InterruptedException {
        for (int i = 0; i < 10; i++) {
            // 线程1更改数据
            Thread t1 = new Thread(() -> {
                a = 1;
                flag = true;
            }, "t1");
            // 线程2读取数据
            Thread t2 = new Thread(() -> {
                if (flag) {
                    a *= 1;
                }
                if (a == 0) {
                    System.out.println("===指令重排了===");
                }
            }, "t2");
            t1.start();
            t2.start();
            t1.join();
            t2.join();
        }
    }
}

